Chapter24: Animals Ii: The Chordates
Section: Chapter Questions
Problem 5SA: A divergence from ________ gave rise to tetrapods. a. ray-finned fishes c. cartilaginous fishes b....
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Use the information and diagram to answer the following question.
Scientists discovered a 375-million-year-old fossil in Canada. The diagram shows the top and side views of the fossil.
Which observation would best support the claim that this organism was a transitional form between amphibians and fish?
- A.
- The fossil is larger than most modern amphibians, but smaller than most ancient fish.
- B.
- The fossil has some body structures that are homologous to amphibians and some body structures that are homologous to fish.
- C.
- The fossil has some body structures that are analogous to amphibians and some body structures that are vestigial.
- D.
- The fossil was discovered near a lake, which shows that the organism needed water to reproduce, as do amphibians and fish.
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